Hyperion

The natural state for moons

tidal locked moons planets earth moon rotation

Why is it the natural state for moons to be tidally locked with their parent planet? With only a few exceptions planets moons always have the same side facing the planet. The craziest exception is the Pluto system with planets/moons in orbital resonance but also with the moons having rotational chaos, apart from Pluto/Charon which …

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Hyperion not destroyed by impacts?

hyperion craters mystery surface geology features saturn moon

If Hyperion, the large strange moon of Saturn, has a density so low that science suggests it is made of ice then how did it survive all those multiple impacts that cover its surface? Hyperion is one of our solar system’s most intriguing objects. One reason is its unusually low density. Although it’s the largest …

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